Several reliable platforms host the full answer keys for the "Planet of Knowledge" (Planeta Znaniy) curriculum:
: This is one of the most popular sources. You can view the Class 4 Mathematics section on GDZ.ru to find both the textbook and workbook (Rabochaya Tetrad) solutions. It allows you to select specific page numbers or exercise numbers directly in your browser.
: This site often provides step-by-step explanations for the 1st part of the textbook, which is helpful if a student is stuck on a specific logic puzzle or multi-step equation. Key Topics in Part 1
Finding solutions for is easy to do online without downloading any files. These "Reshebniks" (GDZ) are designed to help parents check homework and help students understand complex problems. Where to Find Solutions Online
: Since these sites are free, they often have many pop-up ads. Using a browser with an ad-blocker makes navigation much smoother.